Iphone 4 stuck on Iconer app?

Okay, so I downloaded the "Iconer app" on my Iphone 4 I used the app to make new Icons for my facebook twitter and skype. The facebok shortcut worked fine. But when I used the one for twitter it came to this screen that says Iconer at the top and add to home screes, and then what the twitter app looks like that I made with a colorful circle moving around it
I can't lock the phone.
I can't turn it off.
I can't go to the home screen.
I know that my button are working because I can take a screen shot. I tried connecting to Itunes and removing the app I made but it won't let me. I also tried removing the actual twitter app, but it did nothing. I sat the phone down and just tried to let it go into sleep mode and then turn it off but that don't work either. I'm really stuck.

Try doing a hard reset.hold down the round black button and the top right button until it restarts

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